Attachment for road grading machinery



June 6, 1950 I v. sciw 2,510,523

ATTACHMENT FOR ROAD GRADING MACHINERY Original Filed May 29. 1946 3 Sheets-Sheet l 5 J0 Z6 0 go 5 95 IN VEN TQR.

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ATTACHMENT FOR ROAD GRADING MACHINERY Original Filed may 29, 1946 s Sheets-Sheet 2 u I F J 445 I 45 i9 16 41 f3 I7 52 1 ,5 6 10 g 27 S 14 J] 19 a o 55 v I I 32 Kin 'II 56 o 25 3 54 l //A@ 1.9

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ATTACHMENT FOR ROAD GRADING MACHINERY Original Filed May 29, 1946 s sheets-sheet s fitter/way Patented June 6, 1950 ATTACHMENT FOR ROAD GRADING g MACHINERY Vincent Schiavi'; Wilmington, Del., assignorQto Roadgrader Gauge Corporation, a corporation of Delaware Original application May 29, 1946, Serial No.

672,934. Divided and this application December 13, 1948, Serial No. 65,043

The instant application is a division of my pending application, Serial No. 672,934;, filed May 29, 1946, now Patent No. 2,467,157, dated April 12, 1949. V t

My invention relates to improvements in street and road building equipment employing a scraper blade and more particularly to means for adapting and regulating the operation of the scraper blade for use as an accurate leveling and depth gauging tool in the preparation of a road bed to receive a predetermined depth of concrete which will be uniform in thickness throughout.

Such equipment as has been referred to is generally termed a road grader or bulldozer, and my invention has for its object to broaden and increase the 'utility of such power-operated equipment by providing an attachment therefor for vertically supporting the grader scraper blade on rollers adapted to travel upon and follow an edge portion of a preformed road section or curbing and the parallel widely spaced top surface of a metallic side formforheader such as are used for retaining concrete, the rollers being of adequate length and mounted on stub shafts which are both vertically and arcuately adjustable relative to the opposite ends of the grader blade. 7

A further object of my invention is to provide vertical bracing means for each of the stub shafts of the adjustable brackets supporting same on the remote ends of the road grader scraper blade so as to maintain the axes of said shafts substantially normal to the ends of the road grader scraper blade for swinging movement in a horizontal plane during scraping op- Another aim of my invention is to provide a.

form or rail supporting and guiding road grader scraper blade with an attachment including both supporting and guiding rollers which are mounted on the rear end edge portions of the blade for relative adjustment and operation in maintaining the supported scraper blade in pre- 2 Claims. (01. 37 -108) member;

v 2 determined adjusted position throughout its operation.

A still further purpose of my invention is to provide means readily operable from above the road grader scraper blades for vertically adjusting the king pin mounting means of the swingable blade supporting rollers relative to the associated guiding rollers whereby the blade may be adjusted to the desired depth for continuous operation between a pair of supporting forms or rails and the angle varied as required by changes in the distances between the forms or rails during operation.

A still further object of my invention is to provide a depth gauging attachment for the opposite ends of a road grader scraper blade which is capable of being expeditiously mounted on or removed from the blade without alterations of the blade.

Yet another object is the provision of a depth gauging attachment for the opposite ends of a road grader scraper blade, said attachment including a roller supporting member removably carried. by the blade for adjustment longitudinally thereof, the supporting member being provided with means for mounting a roller on an axis normally parallel with thesupporting mem ber, and for vertical adjustment as well as horizontal rotary adjustment for disposition of the axis of the roller at an angle to the supporting the supporting member and roller mount means being provided with means operable manually or hydraulically for efiecting the horizontal rotary adjustment of the roller and retaining same in any given position of adjustment.

Other aims and purposes of my invention relate to a novel attachment for road grader scraper blades and to the combination and arrangement of parts whereby the costs of manufacture as well as the cost usually incident to accurate leveling and grading operations in paving are materially decreased.

Referring now to the accompanying drawings on which similar reference characters represent similar parts:

Fig. 1 is a rear elevational view of a road grader blade embodying my invention, the usually long blade being broken away at the center to illustrate the relationship of the two end supporting members to each other and to the widely spaced side-forms orrrails, which latter are shown in o j.o.,. ,rjw 7;

Pig. 2 an enlarged rear view of an end portion of the road grader scraper blade of Fig. 1

2,510,523 7 l i a showing by full and dotted lines the adjustable roller supporting means in two extreme portions of adjustment;

Fig. 3 is a top plan view of the road grader scraper blade end portion shown in Fig. 2;

Fig. 4 is aview similar to Fig. 3, but takenon' line i4 of Fig. 2, to show the king pin pivoted stub shaft for the supporting roller and its adjustable quadrant mounting;

Fig. 5 is a sectional view taken on line 5-5 of- Fig. 3;

Fig. 6 is a view taken on lineE-G of Fig. 2,-

looking toward the adjacent end of-the-scraper a blade and showing in detail the base mounting of the attachment on the rear faceof the scraper blade, also the slidable mounting for theking pin. receiving bracket members on the base mountins;

rront face, lrom top to bottom and a correspondingconvex rear surface, although the particular shape of. the blade isynot of primary importance.

In the use-of the 'scraper blade, however, it is adapted tobe-moved along while supported in the position illustrated in Fig. 1, by a suitable source of mechanical .power or by hand to cause its lower edge" jto 'scrapaJandlevel a section of ground,

' which'is usually'flanked by side-forms or other Fig. 7 is a view similar to Fig. 6, but taken on line 7-? of Fig. 2. In this view details of the vertical adjusting means for the stub shaft receiving bracket is shown, also the pivotalm'ount ing of the stub shaft on-thekingpin inthe backet;

Fig.8 is another view similar to that shown in the attachment areshown in section; and V Fig. 9 is a topplan .view' of a'road graderscraper-,blade -equipped with my invention-and. showing how the blade wouldappear when sup ported in use thereby upon sideiorms so as to extend to the desired depth -into the-relatively narrow space between the forms.

Before referring tothe various parts by refer-- Fig. 6, but taken-on line 8-43 of Fig.2, so thatonly the scraper blade and base mounting for once numerals'it is-desired to point out that in road building usingahard surface such as concrete -or;ot-her-plastic material, it is vitally essential that a predetermined grade be maintained. The most; common method W-inf1156 is to rough gradethe soilor sub-base and then place thereon forms-to containthe plastic {ma-- terials, or-ii aportionofthe road-'has-been built to use that porticn-as'one side of the form. Prior 'fiQrthe"pQ}l1'ing'Of theplasticmaterial-it is essential to fine: grade theqsoil orsubj-'base-soat e latter is. true "in depth. Consequent when t e p a tic ma erials: are. po r d-and: fi lished the roadway; will: be of uniform thickness throughout:

Several "methodspf obtaining the required:

depth are now inuse as; follows z" 1. Handgradznma-Aslowand costly-process which is not particularly accuratedepending 1 upon the degree'ofcare exercised by the individuals performing the operation.

2. Power fine grading anachines.--These while short distancesare'to be graded or -where-frequent moving :10f' the equipment is necessary. Finally, hand gradingis not entirelyeliminated.

3. Dragv or trail type g-mden-Madeto be pulled or draw-n-by hand or by'power e uipm'ent.-

This does not always give satisfactory resultszon mixed types of soil constituting the sub-base. .ldditionall-mdt-is a very-slow-method offine gradingandthe use of-1a drag grader'or trail type grader always requires hand: grading; to create Such equipment,- further-.-

a satisfactory-base. more. is not of use for anyotherpurpose.

It will now be apparent that the invention...

contemplates.v an attachmentv for regulating the depth of-cut necessary to'fbringl the (soil or. S'llbe:

generally Iparallel arranged rails, road sections, curbing or the like designated at 6 and 7 in Fig.1.

While various type of subgraders'have hereto fore been used forsubgrade leveling, and which have no doubt been generally satisfactoryior: the contemplated purposes, I am 'notaware of anvmeans-heretoforeused.for converting a common :road grader or bulldozerto produce the accurate leveling and gauging requiredinelayinga predetermined thicknessof concrete iii-paving operations.'- With the instantinventionyhoweve y the utility of a generally available common road grader,- bulldozer or similar-road buildingeequip-yment used for ordinary scraper duties-is -.-increasedto encompass fine grading. Itwill be understood that while-the attachment increases theutilityitin ne wayinterferes with other normal -uses of the aforementioned-equipment.

Means permitting "very careful and .ta-ccurate. gaugingandsetting-:01 the scraper for. operation over long stretches of ground is required which i can be fEEQdiIYiQCtHatEQ aHd set .without-neoessh A tating attention by expert'h'elp.- I

To; this end,I have mounted upon therear con-- vex .surface of==the blade 5 -adjacent--each end thereof, a base or fill block or-shims :8 :which rare-f shaped on one side .to'closelyconform to -.'the'- curvature "of the blade and present afiatv outer or rear side.

On the outerilatside of the-block sis' rigidly secured, as by machine screws=9,-a base-plate 4 0- which supports and connects-a painoi vertically spacedbr'acket arms I l and i2.

Swiveled-within a-socket 13 in th upper face oi the lower and shorten arm -l 2-.-is an adjusting:

screw is which passes freely-through an-:l":.isguided adjacentits- :upper end by a: -cylindricaJr-' bore id in the upper arm H parallel with thebasew platei 9. Asuitable handle. I 6-is mounted at H on the upperencl of the screw for operatinglthe same irom-above the scraperebladesi.

A slotted slide plate 1 Sis-mounted on the outer face ofathe fixed. base -pla-te -l I The slide-plate l8isvertically adjustablysecuredto thebase plate 1 ll by'means ofheadedwmajchine screws] 9' supported iromnthe baserplate andrwhich extend through spacedslQts-Z L in the platetB-so as to brace and guide-the -platewhen-.moved upward or downwardly-byadjustmentsorathe adjusting screw i4 threadedly engaging and --passing through thehub-ZEoi saidslideplate.

Projectingoutwardlyirom hub22 area pairwis spacedwebs or-quadranta-23, -24.to which-fur-ther and-moredetailed reierencawill be made' here mafter.-- Supported by the uadrants;23;.24Lior -moveme.nt therewithisthe lowenendlfiloia yer.

gamma tically extending king pin 26 the upper end of which passes freely through and is guided by an aperture 21 in upper arm ll.

Pivotally mounted on the king pin 29 between the quadrants or Webs 23, 24 is the eye-shaped inner end of the stub shaft 29, on which the elongated cylindrical blade-supporting roller 30 is journalled, as best shown in the enlarged sectional view of Fig. 5,

As a means for bracing the roller 3!] there is provided a supporting and bracing bracket 33 one end of said bracket engaging the outer end of the stub shaft 29 while the other end of the bracket has a collar 32 receiving the upper end of the king pin 26.

Referring now to Figs. 3, 4 and '7 it will be seen that each of the webs orquadrants 23, 24 is provided with circumferentially spaced apertures 33, 34, respectively. Retaining pins 35, 36 are adapted to pass through pairs of aligned apertures in the quadrants to fix the position of the stub shaft and thus retain the roller 30 in any of a plurality of adjusted positions, as will be understood by reference to Fig. 9 of the drawings.

Cooperating with the blade supporting roller 30 is a second and very much smaller guide roller '31. This guide roller is mounted for rotation on a vertical spindle 38 which is journalled in a pair of ears 39 projecting from the lower outer corner portion of the base plate I so that its position is fixed relative to the lower edge of the blade 5. In this position the roller 31 is operative in any angular or vertically adjusted position of the blade 5 as will be noted by reference to Figs. 1 and 9.

The structural features above described permit vertical adjustment of the roller 30 relative to the longitudinal edges of the blade 5 as Well as an arcuate horizontal adjustment about the king pin 26 as a vertical axis. The advantages flowing from this arrangement will now be obvious.

It is to be particularly noted that the mounting of the roller 30 on a vertical axis for swinging movement in a horizontal plane provides for disposing the blade 5 at an angle to the supports 6 and 1 as shown in Fig. 9 and such mounting also permits swinging the rollers to a wholly inoperative position as is indicated by dot and dash lines in Fig. 2.

Preferably, a scraper or debris removing apron 4! is provided for removing obstacles from the path of roller 39 and such apron desirably includes a vertically disposed metallic plate 42 supported from bracket 3| by a pair of angularly bent brackets 43. The lower part of the scraper comprises a strip of rubber 44 secured to the lower edge of the plate 42. This scraper is illustrated in Fig. 5 only and is omitted from the other figures, this for greater clarity of illustration.

While the invention has been described in detail, various changes will occur to those skilled in the art. It is contemplated to cover all such and to be limited in this respect only as may be necessary by the scope of the claims hereto appended.

Having now described my invention in detail, what I claim and desire to secure by Letters Patent is:

1. An attachment for a scraper blade of a road building machine comprising a base plate for attachment to one end of the blade, a second plate slidably mounted on said base plate, said slidable plate having a king pin movable therewith, a roller movable with said slidable plate, said roller being journalled for arcuate movement on said king pin.

2. An attachment for a scraper blade of a road building machine comprising a base plate for attachment to one end of the blade, a second plate slidably mounted on said base plate, said slidable plate having a pair of horizontally projecting apertured spaced webs, a king pin supported by said webs, a roller carrying shaft journalled on said king pin, and means passing through the apertures in said webs for holding the roller in an arcuately adjusted position.

VINCENT SCHIAVI.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 413,846 Chambers Oct. 29, 1889 561,633 Walker June 9, 1896 1,849,754 Darrow Mar. 15, 1932 1,978,464 Leydecker Oct. 30, 1934 

